Concept

Peristaltic pumps have been designed to extrude pastes, but they have a flaw in that they pulse. One solution that should remove most of the pulsing is to design a dual chamber pump with the pinch wheels 180 degrees out of phase.

Design

The current design is a parametric design in OpenScad. I am designing to use the 608 skate bearings as pinch wheels, standard silicon fish tank tubing and a Nema 17 stepper motor with the herringbone gear set.

Status

The design work is about 70% done, but there are still significant hurdles. More to come.